ProgramNode(6...34)(
  [:foo],
  StatementsNode(6...34)(
    [LocalVariableOperatorWriteNode(6...24)(
       (6...9),
       (10...12),
       CallNode(21...24)(nil, nil, (21...24), nil, nil, nil, nil, 0, "bar"),
       :foo,
       :+
     ),
     CallNode(31...34)(nil, nil, (31...34), nil, nil, nil, nil, 0, "baz")]
  )
)
